Valve-seat



(No Model.)

D. J. NYSEWANDEE.

VALVE SEAT.

No. 338,609. Patented Mar. 23. 1886.

l l I .dttorneyy;

UNITED STATES PATENT OFFICE.

DAVID J. NYSEWVANDER, OF NElV OARLISLE, OHIO.

VALVE-SEAT.

EJPEGIEJIQATIQN forming part of Letters Patent No. 338,609, dated March23, 1886.

Application filed July 22, 1885. Serial No.1'72, 313. (No model.)

To all whom it may concern.-

Be it known that I, DAVID J. NYSEW'ANDER, a citizen of the UnitedStates, and a resident of New Oarlisle, in the county of Clark and Stateof Ohio, have invented certain new and useful Improvements inValve-Seats; and I do hereby declare that the following is a full,clear, and exact description of the invention, which will enable othersskilled in the art to which it appertains to make and use the same,reference being had to the accompanying drawings, which form a part ofthis specification.

My invention has for its object the production of an elasticvalve-seatespecially designed to be used in lift-pumps, which shall possessadvantages in the points of simplicity, durability, and generalefficiency; and to these ends my invention consists in the improvedconstruction, arrangement, and combination of parts, which will behereinafter fully described, and pointed out in the claims.

Referring to the annexed drawings, Figure 1 is a vertical sectional viewof the lower end of a lifiJ-pump cylinder with its cap in which myinvention is embodied, and Figs. 2, 8, and 4 are similar views showingmodifications of my invention which it may be desirable to employ undercertain circumstances in place of the peculiar construction shown inFig. 1.

The same letters of reference indicate corresponding parts in all thefigures.

Referring to the several parts by letter, A represents the cylinder ofthe pump, the lower portion of which only is shown, the lower extremityof the said cylinder being provided with the usual externalscrew-thread, a, to adapt the cap B to be secured thereon in itsoperative position; or the cap and cylindermay have suitable flanges toadapt them to be bolted together.

B represents the cap,which is provided with the usual central verticalopening or inlet-port, B, and is further east with theupwardly-extending annular flange B encircling the upper end of the saidcentral vertical opening, as shown, for the purpose which will behereinafter set forth.

0 indicates an annular rubber cushion, of a suflicientdegree ofsoftness, which forms the valve seat, the said rubber cushion restingupon the flat upper surface of the cap B, with the centralupwardly-extending flange, B extending up within the central aperture ofthe said cushion for a sufficient height, thereby serving to hold thesaid cushion in its operative position, and more particularly to preventits inner circular edge, I), from being forced over or beyond the edgesof the central aperture or inlet-port, B, when the cap 13 is screwed uptightly upon the lower end of the cylinder A, for the purpose ofsecuring the valve D and the valve-seat securely in position. Theannular rubber cushion C is provided at a point sufficiently near itscentral aperture with the annular groove C,which forms the usualsandchamber.

D represents the valve, which is of ordinary construction. lhis valvemay, if desired, be placed immediatcl y upon the rubber cushion G, andsecured in its operative position by screwing the cap B up upon thescrew-threaded lower end of the cylinder A until the lower circular edgeof the said cylinder bears firmly upon the flange of the leather valve,thereby securing the same tightly upon the rubber cushion, and alsoholding the cushion itself firmly in position. It will be seen that bythis arrangement, if the valve or cushion becomes loosened from anycause, they may be readily tightened in their operative positions byscrewing the cap B a little farther up upon the end of the cylinder, soas to cause the lower end of the cylinder A to bear more firmly downupon the valve and cushion,as will be readily understood.

An annular metallic plate, E, of brass, copper,or other suitablemetahmay be placed upon the upper side of the rubber cushion, ifdesired, between the said cushion and the-valve, the central opening ofthe said plate being considerably larger than the central aperture ofthe rubber cushion, so that the inner circular edge of the said platerests within the annular groove 0 of the cushion, as shown, so as toleave the seat 0, formed by the inner portion of the cushion, free forthe reception of the valve proper.

The circular annular rubber cushion O is made of such a diameter thatwhen placed in operative position in the cap B its outer circular edgewill extend beneath the lower edge of the cylinder A, as shown in thedrawings, so that when the cap B has been screwed up tightly upon thelower screw-threaded end of the said cylinder the pressure of the loweredge of the said cylinder will render it impossible for the valve D,under the pressure of the water on each downstroke of the pumppiston, toforce the seat (3 of the said rubber cushion down or outward away fromthe central flange, B ,-unti1 the valve would come in contact with theupper end of the metal flange B, which would be liable to occur if arubber ring merely surrounding the flange 13 without extending beneaththe lower end or edge of the cylinder A were employed in place of myimproved rubber cushion hereinshown and described. The metallic annularplateE also serves, when the cap B has been screwed up tightly upon theend of the cylinder A, to exert an even pressure upon the main portionof the upper side of the rubber cushion G, and thereby force the innercircular edge of the said cushioninto firmer contact with the flange B,thereby facilitating the before-mentioned object and holding the cushionfirmly in its operative position.

The upwardly-extending central flange, B which is cast integral with thecap B, may be entirely dispensed with, if desired, as shown in Fig. 2 ofthe drawings, by making the cushion of vulcanized rubber of a sufficientdegree of hardness to prevent its inner edge from being forced over soas to partly obstruct the upper end of the inlet-port B, the cushion inthis case being also made of such a diameter that its outer circularedge will extend beneath the lower edge of the cylinder A, as shown; orthe cap may be cast with an inwardlycurved flange, F, and an annularrecess, F, in its upper face, as shown in Fig. 3 of the drawings, so asto leave the annular shoulder F", between which and the curved flange Fthe lower portion of the rubber cushion is tightly wedged, the cushionbeing in this case cut away at its rear lower portion annularly at G,this arrangement effecting a considerable saving in material, as will bereadily seen. The cap may also be constructed with the two concentricannular grooves H and H, leaving the annular bead or projection H overwhich the inner portion of the cushion I, which in this case may be ofleather, extends, a metallic thimble, J, having the flange J at itsupper end, being screwed down within the upper end of the inlet-port ofthe cap, so as to firmly secure the inner annular edge of theleathercushion I, while an annular metallic plate, K, .is placed betweenthe valve and the said cushion in the position shown, so as to leavethat portion of the leather which passes'over the,

I annular bead H clear for the reception of the the construction of myinvention will be readily understood without requiring further ex-'planation. It will be seen that the valve comes in direct contact withthe annular rubber valve-seat, and that therefore the corrosion whichinfallibly ensues when a leather valve is brought in contact with metalof any kind is entirely avoided, while by' constructing the rubbercushion on which the valveseat isformed of such a diameter that itsouter circular edge will extend beneath the lower edge of the cylinder Athe rubber valve-seat is held firmly in its operative position when thecap B is screwed up tightly upon the lower end of the said cylinder, as

before described.

The upwardly projecting annular flange prevents the sand from workingunder the rubber cushion, which it would otherwise be liable to do.

The cap may be tightened'upon the lower end of the, cylinder to take upwear at any time.

Having thus described my invention, what I claim, and desire to secureby Letters Patent of the United States, is v 1. The combination, withthe cap formed with the central upwardly-extending annular flange, ofthe annular -rubber cushion forming an elastic valve-seat, andconstructed ofsuch a diameter that-when placed in operative positionwithin the said cap its outer circular edge will extend beneath thelower edge of the pump-cylinder, upon the lower end ofwhich the said capis adjustably secured, as and for the purpose set forth.

2. The combination of the cap formed with the central upwardly extendingannular flange, the annular rubber cushion forming an elastic"alve-seat, and constructed of such a diameter that when placed inoperative po-' sition within the said cap its outer circular edge willextend beneath the lower edge of thepump-cylinder upon the lower end ofwhich the said cap isadjustably secured and the valve arranged above thesaid cushion, as described.

3. The combination, with the cap having its upper end provided with theinterior screw-thread to adapt it to be secured adjustably upon thelower end of the pump-cylinder, and formed with the centralupwardlyextending'annular flange, of the annular rubber cushion formingan elastic valve-seat,

and constructed of such a diameter that when placed in operativeposition within the said cap its outer circular edge will extend beneaththe lower edge of the pump-cylinder, upon the lower end of which thesaid cap is adjustably secured, substantially as and for the purposeshown and described.

edge will extend beneath the lower edge of the pump-cylinder, upon thelower end of which the said cap is adj ustably secured, and

the annular metallic plate arranged, as described, above the saidcushion.

5. The combination, with the cap having its upper end provided with aninterior screwthread to adapt it to be secured adjustably upon the lowerend of the pump-cylinder, and formed with the central upwardly-extendingannular flange, of the annular rubber cushion forming an elasticvalve-seat, and constructed of such a diameter that when placed inoperative position within the said cap its outer circular edge willextend beneath the lower edge of the pump-cylinder, upon the lower

